Patent US3680496A successfully refreshed from Google Patents.
US3680496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pallet
Assignee: Westlake Plastics Co
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Filing: 1970-06-08
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Granted: 1972-08-01
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Expires: 1990-06-08
Abstract
Abstract A sterilizable reusable pallet made of a thermoplastic comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining legs, and means affixing said legs to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, the pallet acting to resist bending in vertical planes transverse to the main horizontal plane of the pallet. The invention also encompasses economical and efficient methods of making the pallet.
Inventors
- 👤 Edward B Westlake Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:44
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C65/00; B29C65/02; B29C65/08; B29C65/18; B29C65/20; B29C65/2007; B29C65/203; B29C65/34; B29C65/36; B29C65/3604; B29C65/3644; B29C65/3672; B29C65/3676; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1244; B29C66/12441; B29C66/126; B29C66/20; B29C66/21; B29C66/302; B29C66/3022; B29C66/30223; B29C66/54; B29C66/543; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/84; B29C66/843; B65; B65D; B65D19/00; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B29C66/004; B29C66/0042; B29C66/53461; B29C66/53462; B29C66/71; B29C66/81; B29C66/812; B29C66/8122; B29C66/83; B29C66/832; B29C66/8322; B29L; B29L2024/00; B29L2031/00; B29L2031/712; B29L2031/7178; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00258; B65D2519/00263; B65D2519/00273; B65D2519/00278; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00333; B65D2519/00368; B65D2519/00373; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00562; B65D2519/00567; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/80; Y10; Y10S; Y10S108/00; Y10S108/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining tubular legs affixed to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said sheets including recesses opening through the inner surfaces thereof, the ends of said legs extending into said recesses and being welded thereat.
Claim 2
Dependent Claim
95 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining tubular legs affixed to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said sheets including recesses opening through the inner surfaces thereof, the ends of said legs extending into said recesses and being welded thereat.
Claim 3
Dependent Claim
21 words
The pallet of claim 1 and a metallic ring in each recess of thickness less than the depth of the recess.
Claim 4
Dependent Claim
156 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining legs and means affixing said legs to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said legs comprising opposed indentations formed in the top and bottom sheets, each indentation including a peripheral wall and a web, and means joining the webs of the indentations of the top sheets to the webs of the indentations of the bottom sheets, said joining means including a recess in the web of one sheet, a protuberance in the corresponding web of the other sheet received and cemented or welded in said recess and a metallic ring embedded in said recess.
Claim 5
Dependent Claim
156 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining legs and means affixing said legs to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said legs comprising opposed indentations formed in the top and bottom sheets, each indentation including a peripheral wall and a web, and means joining the webs of the indentations of the top sheets to the webs of the indentations of the bottom sheets, said joining means including a recess in the web of one sheet, a protuberance in the corresponding web of the other sheet received and cemented or welded in said recess and a metallic ring embedded in said recess.
Claim 6
Dependent Claim
118 words
A precursor assembly for making a sterilizable reusable plastic pallet comprised of vertically spaced top and bottom substantially rectangular sheets of thermoplastic resin, spaced recesses opening through the inner surfaces of said sheets and disposed along the sides and in the center thereof, and tubular thermoplastic legs of wall thickness approximating the width of said recesses, the recesses conforming in shape to the ends of said legs, a metallic ring positioned in each recess of thickness less than the depth of the recess, the ends of each leg adapted to enter corresponding recesses in said sheets and to be affixed therein to form a pallet with entry ways between said legs for forks of a fork lift truck.
Claim 7
Dependent Claim
118 words
A precursor assembly for making a sterilizable reusable plastic pallet comprised of vertically spaced top and bottom substantially rectangular sheets of thermoplastic resin, spaced recesses opening through the inner surfaces of said sheets and disposed along the sides and in the center thereof, and tubular thermoplastic legs of wall thickness approximating the width of said recesses, the recesses conforming in shape to the ends of said legs, a metallic ring positioned in each recess of thickness less than the depth of the recess, the ends of each leg adapted to enter corresponding recesses in said sheets and to be affixed therein to form a pallet with entry ways between said legs for forks of a fork lift truck.
Claim 8
Dependent Claim
148 words
A precursor assembly for making a sterilizable reusable plastic pallet comprised of vertically spaced top and bottom substantially rectangular sheets of thermoplastic resin, the top sheet being formed with downwardly extending indentations each having a peripheral wall and a web and the bottom sheet being formed with upwardly extending indentations each having a peripheral wall and a web, the indentations being spaced along the sides and across the center of the sheets and the webs of one set of indentations opposing the webs of the other set of indentations, a recess in the web of one indentation, a metallic ring positioned in each recess of thickness less than the depth of the recess and a substantially coextensive protuberance on the web of an opposing iNdentation adapted to interengage with and be secured in the recess to provide a pallet with integral legs joining the top and bottom sheets.
Claim 9
Dependent Claim
148 words
A precursor assembly for making a sterilizable reusable plastic pallet comprised of vertically spaced top and bottom substantially rectangular sheets of thermoplastic resin, the top sheet being formed with downwardly extending indentations each having a peripheral wall and a web and the bottom sheet being formed with upwardly extending indentations each having a peripheral wall and a web, the indentations being spaced along the sides and across the center of the sheets and the webs of one set of indentations opposing the webs of the other set of indentations, a recess in the web of one indentation, a metallic ring positioned in each recess of thickness less than the depth of the recess and a substantially coextensive protuberance on the web of an opposing iNdentation adapted to interengage with and be secured in the recess to provide a pallet with integral legs joining the top and bottom sheets.
Claim 10
Dependent Claim
167 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining legs and means affixing said legs to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said legs comprising opposed indentations formed in the top and bottom sheets, each indentation including a peripheral wall and a web, and means joining the webs of the indentations of the top sheets to the webs of the indentations of the bottom sheet, said joining means including a recess in the web of one sheet and a protuberance in the corresponding web of the other sheet received and cemented or welded in said recess, said protuberance including an upstanding ridge which contacts the inner wall of said recess and is fused thereto.
Claim 11
Dependent Claim
167 words
A sterilizable reusable pallet made of a thermoplastic resin comprising a top substantially rectangular load engaging sheet, a bottom sheet substantially coextensive therewith, spaced plastic load sustaining legs and means affixing said legs to and between said sheets along the sides and across the center of the sheets to provide a pallet with entry ways for forks of a fork lift truck from all four sides between the legs and the top and bottom sheets, said legs comprising opposed indentations formed in the top and bottom sheets, each indentation including a peripheral wall and a web, and means joining the webs of the indentations of the top sheets to the webs of the indentations of the bottom sheet, said joining means including a recess in the web of one sheet and a protuberance in the corresponding web of the other sheet received and cemented or welded in said recess, said protuberance including an upstanding ridge which contacts the inner wall of said recess and is fused thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |